Engine Performance problem
2000 Buick Lesabre 6 cyl Front Wheel Drive Automatic 90,000 miles
I have a 2000 Buick Lesabre. It idles around 1400 rpm when I start it up from being cold and takes several minutes before it comes down to normal. I've replaced the IAC and that didn't help. I had a vacuum line that sits on top of the front valve cover and intake go bad. I replaced it. I don't think it is a vacuum problem because the engine falls on it's face if I unhook a vacuum line. A dealer mechanic said these cars were prone to having a broken wire going from the IAC to the computer.
I haven't replaced any of the temperature sensors on it. I believe there are several. Any idea which one would be responsible for sending temperature to the computer? This car has a temp guage in it as well and it seems to work fine.
I'm wanting to get this fixed as it causes a hard shift when I start it up. I just noticed today that it is shifting hard while I'm driving. I'm going to have the tranny flushed with the BG system to see if that solves the hard shifting problem. Thanks for any input.
have the same problem?
Sunday, April 12th, 2009 AT 6:06 PM